GACS lclab Honors Biology - Chapter 3 - Communities, Biomes and Ecosystems - Section 3.1 - Community Ecology
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lclab2 on October 14, 2009
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GACS lclab Honors Biology - Chapter 3 - Section 3.1 - Community Ecology
Classes:
world history, Friends, GACS lclab - Honors Biology
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22 terms
Terms | Definitions |
|---|---|
 environment | all living organisms are limited by factors in the |
| ecosystems on long are grouped into biomes primarily based on | the plant communities within them |
| aquatic ecosystems are group based on | abiotic factors such as water flow, depth, distance from shore, salinity and latitude |
| Great Barrier Reef | largest living structure on Earth and is visible from space |
| Great Barrier Reef | extends more than 2,000 km in length |
| coral reefs | grow at a rate of only about 1.27 cm per year |
| Most diverse reefs | located where Indian and Pacific oceans meet; 700 species of coral |
| biological community | a group of interacting populations that occupy the same area at the same time |
| organisms | adapt to the conditions in which they live |
| limiting factor | any abiotic factor or biotic factor that restricts the numbers, reproduction, or distribution or organisms |
| abiotic limiting factors | sunlight, climate, temperature, water, nutrients, fire, soil chemistry and space |
| biotic limiting factors | living things such as plant and animal species |
| tolerance | ability of any organism to survive when subjected to abiotic |
| ecological succession | change in an ecosystem that happens when one community replaces another as a result of changing abiotic and biotic factors |
| two types of ecological succession | primary succession and secondary succession |
| primary succession | the establishment of a community in an area of exposed rock that does not have any topsoil |
| primary succession | usually occurs very slowly at first |
| pioneer species | first organisms to appear, lichens along with some moss |
| pioneer species | help create soil by secreting acids that hlep to break down rocks |
| climax community | the stable, mature community that results when there is little change in the composition of species |
| secondary succession | the orderly and predictable change that takes place after a community of organisms has been removed but the soil has remained intact |
| pioneer species | first species to start secondary succession |
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